Using Aldera for basal cell carcinoma? (Photo)

My dermatologist prescribed Aldera for a spot on my chest to treat basal cell carcinoma. I had several spots which although not tested looked like the spot that did test positive. I put Aldera over the area and now it is all red, bumpy and itchy. Will Aldera cause this reaction in an area if the skin is normal? I also have a bump starting on my face close to an area where I put it. Lastly, another post said this is toxic? Is this safe for my kids to be around me?